Centralized Data Processing
Under the centralized data processing model, all data processing is performed by one or more large computers housed at a central site that serves users throughout the organization. Figure 2.1 illustrates this approach, in which IT services activities are consolidated and managed as a shared organization resource. End users compete for these resources on the basis of need. The IT services function is usually treated as a cost center whose operating costs are charged back to the end users. Figure 2.2 illustrates a centralized IT services structure and shows its primary service areas: database administration,